The Palo Alto Weekly was founded in 1979 by a group of longtime local residents who believed that the Palo Alto community needed a high- quality newspaper that would provide an alternative to the Palo Alto-based daily. The Weekly's goal...

Can a hedge-fund guy find fame, fortune and fulfillment as a social entrepreneur? Meet Sal Khan of Mountain View, an MIT-trained former hedge-fund analyst who is fast becoming — somewhat accidentally, as he tells it — math teacher to the world.

Can a hedge-fund guy find fame, fortune and fulfillment as a social entrepreneur? Meet Sal Khan of Mountain View, an MIT-trained former hedge-fund analyst who is fast becoming — somewhat accidentally, as he tells it — math teacher to the world.